## Semi Precision Balls manufacturer Abbott Ball Company

Semi-precision balls must be free of such defects when inspected without magnification. Size is the mean diameter, measured between two parallel planes on the ball surface. Tolerances for semi-precision balls are 0.0005 (grade 100) up to 0.005 (grade 1000). Sphericity is defined as the deviation (out-of-round condition) from a true ...

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